DGM

Last seen: Today | Active since 2015

Hi, I'm nobody. I don't belong here, but I have nothing better to do. Matlab used to be part of my work. Now it's part of my hobbies. That's pretty sad, really. -- I don't reply to email anymore. If you have a question about my questionable FEX submissions, leave a comment on the FEX page and I'll get the notification. Alternatively, ask a question on the forum and @DGM me so I'll get notified.

Statistics

All

View badges

Content Feed

Answered
any ideas for making code faster?
Here. This is about 5x as fast, though it could be improved I'm sure. R = [0.004 0.0057 0.005 0.005 0.0045 0.0044 0.005]; X =...

en dag ago | 0

| accepted

Answered
How to save Histogram of Multiple Images
This should be a start sourcefolder = 'E:\input'; filepattern = fullfile(sourcefolder, '*.png'); % this shouldn't be in the...

2 dagar ago | 0

| accepted

Answered
Index exceeds the number of array elements in image processing.
Obviously, not all columns of the edgemap will contain nonzero elements, so r will often be zero-length. Also, Graycrop isn't u...

2 dagar ago | 0

Answered
thermal image processing to get the temprature on each pixel
Image Analyst has a number of examples https://www.mathworks.com/matlabcentral/answers/320467-i-need-to-convert-rgb-image-into...

4 dagar ago | 0

| accepted

Answered
convert image in matlab
As IA notes, in order to find out how to do a Photoshop task in MATLAB, you figure out how to do it in Photoshop first. Transla...

4 dagar ago | 0

Answered
Place one image on a blank image but several times i.e (passport style)
If the FG images are simple, solid rectangular images, you can just write a loop and insert each image into the background by di...

4 dagar ago | 0

Answered
How to blur with a controlled area?
If the user has Image Processing Toolbox, using roifilt2() or even imfilter()/imgaussfilt() could simplify the task. For a smal...

4 dagar ago | 0

Answered
Fill contour color into the graph
I somehow doubt this is actually what you want, but I'll oblige. % given theta = [80.86 81.36 81.82 82.38 82.98 83.64 84.28 85...

5 dagar ago | 0

Answered
Save a grayscale image as an colored image
Depending on what you mean when you say you want it to be a colored image, this might have the answer: https://www.mathworks.co...

5 dagar ago | 0

| accepted

Answered
How to generate a multi-dimensional array from a vector ?
I'm sure there are more elegant ways, but here's this. I'm pretty sure it works. % inputs m = 3; x = [1 2 3 4 5 6 7 8 9]; ...

6 dagar ago | 0

Answered
MATLAB output is a bunch of numbers with operators not the exact number
To be pedantic, those expressions are the exact result. The decimal values are an approximation. That said, you should be ab...

6 dagar ago | 0

Answered
this is a part of my code, I am getting this message. "Unable to perform assignment because the indices on the left side are not compatible with the size of the right side."
I'm going to go out on a limb and say that there's no reason to believe that the RHS of this assignment is a scalar. index(i)...

6 dagar ago | 0

Answered
How can i correct brightness of a monochrome image using arithmetic operations?
For basic brightness/contrast controls, see this demo. https://www.mathworks.com/matlabcentral/answers/496452-contrast-vs-brigh...

6 dagar ago | 0

Answered
How can I combine bit map images to get back the original grey scale image?
Using a bunch of numbered variables forces you into writing unnecessarily repetitive code. This can be simplified. One way wou...

6 dagar ago | 0

Answered
How to superimpose many images using loop?
Imfuse is a simple tool for visually comparing two images. It has no practical use for processing more than two images. It sho...

6 dagar ago | 0

Answered
How can I use sliceomatic for 3D plots without getting the below errors?
As far as I know, sliceomatic() has been broken for years. As the error says, 'new' is not a valid option for the 'nextplot' pr...

6 dagar ago | 0

Answered
Combining images to make a composite image
There are a number of ways to do this. As usual, I'm going to generalize a bit since I doubt OP is the one who will see this an...

7 dagar ago | 0

Answered
How to overlap more than two images into a one image with Matlab?
Imfuse() is a simple tool for visually comparing two images. It has no utility for similar tasks involving more than two images...

7 dagar ago | 0

Answered
if loop dosen't complete?
size() returns a variable-length vector. Don't compare against the size() of an array if you're trying to compare against a sca...

8 dagar ago | 1

| accepted

Answered
how to create random value matrix with size 3X5?
If the numbers are supposed to be integers: A = randi([1 10],3,5) otherwise, if the numbers can be any value in the specified ...

8 dagar ago | 0

Answered
Running out of memory using imfuse repeatedly
The reason you're running out of memory is simple. Whenever imfuse() concatenates two images using the 'montage' option, the re...

8 dagar ago | 1

| accepted

Answered
Surround color for display
When you mask off data using NaN, the plot is simply not drawn there, revealing whatever graphics objects might be beneath it. ...

9 dagar ago | 0

| accepted

Answered
using nested for loop to print all of factorial
Something like this should be a start: for n = 1:100 % set a nested for loop factorials = 1; % this needs to be reset insi...

10 dagar ago | 0

| accepted

Answered
How may one digitize a curve from an image
These two answers are relevant and contain links to other related answers. https://www.mathworks.com/matlabcentral/answers/16...

11 dagar ago | 0

| accepted

Answered
Problem bluewhitered function colormap
bluewhitered() doesn't work like normal colormap tools. It actually queries the current axes 'clim' property and the map is tru...

12 dagar ago | 0

Answered
Function int2bit not found
int2bit() was introduced in R2021b. If you're using R2019b, it's not available.

12 dagar ago | 0

Answered
Unable to apply separate colormaps and display in subplots
You can fix that by explicitly specifying the axes in the call to colormap(). original = imread('cell.tif'); h1 = subplot(2,...

12 dagar ago | 0

| accepted

Answered
Extract a series of values every n row of a matrix
Consider the small example: % a small 100x3 test array A = repmat((1:100).',[1 3]) % parameters blocksize = 10; rowstokee...

12 dagar ago | 0

| accepted

Answered
i have been given to find out the psnr value of a hyperspectral image / data. its is of size 690*110*300. how can i proceed to do that?
Consider the example: A = rand(10,10,10); B = A + randn(10,10,10)*1E-6; % using IPT psnr() R0 = psnr(B,A) % using basic...

12 dagar ago | 0

Answered
making matrix with text file information
EDIT: updated to handle new file encoding and empty blocks I'm just going to throw this out there. I'm sure it's entirely over...

12 dagar ago | 0

| accepted